<template>
    <div>
        <!-- 顶部滑动条区域 -->
        <div id="slider" class="mui-slider">
            <div id="sliderSegmentedControl" class="mui-scroll-wrapper mui-slider-indicator mui-segmented-control mui-segmented-control-inverted">
                <div class="mui-scroll">
                    <a v-for="item in cates" :key="item.id" :class="['mui-control-item', item.id===0 ? 'mui-active' : '']" @click.prevent="getPhotoListByCateId(item.id)" data-wid="tab-top-subpage-1.html">
                        {{ item.title }}
                    </a>
                </div>
            </div>
        </div>

        <!-- 图片列表区域 -->
        <ul class="photo-list">
            <router-link :to="`/home/photoinfo/${item.id}`" v-for="item in list" :key="item.id" tag="li">
                <img v-lazy="item.img_url">
                <div class="info">
                    <h1 class="info-title">{{ item.title }}</h1>
                    <div class="info-body">{{ item.zhaiyao }}</div>
                </div>
            </router-link>
        </ul>
    </div>
</template>

<script>
import mui from '../../lib/mui/js/mui.min.js'
import axios from 'axios'
import {Toast} from 'mint-ui'

export default {
    data () {
        return {
            cates : [], // 图片分类列表
            list : []   // 图片列表
        }
    },
    created () {
        this.getAllCategory()
        this.getPhotoListByCateId(0)
    },
    methods : {
        async getAllCategory () {
            try {
                const { data } = await axios.get('/api/img-categorys')
                data.unshift({
                    id : 0,
                    title : '全部'
                })
                this.cates = data
            } catch (err) {
                const { status, statusText } = err.response
                Toast(status + statusText)
            }
        },
        async getPhotoListByCateId (cateid) {
            try {
                const { data } = await axios.get(`/api/imgs/${cateid}`)
                this.list = data
            } catch (err) {
                const { status, statusText } = err.response
                Toast(status + statusText)
            }
        }
    },
    mounted () {
        // 当 组件中的DOM结构被渲染好并放到页面中后，会执行这个 钩子函数
        // 如果要操作元素了，最好在 mounted 里面，因为，这里时候的 DOM 元素 是最新的
        // 2. 初始化滑动控件
        mui(".mui-scroll-wrapper").scroll({
            deceleration: 0.0005 //flick 减速系数，系数越大，滚动速度越慢，滚动距离越小，默认值0.0006
        });
    }
}
</script>

<style lang="scss" scoped>
* {
    touch-action: pan-y;
}
.photo-list {
    list-style: none;
    margin: 0;
    padding: 10px;
    padding-bottom: 0;
    li {
        background-color: #ccc;
        text-align: center;
        margin-bottom: 10px;
        box-shadow: 0 0 9px #999;
        position: relative;
        img {
            width:100%;
            vertical-align: middle;
        }
        img[lazy="loading"] {
            width: 40px;
            height: 300px;
            margin: auto;
        }
        .info {
            color:white;
            text-align: left;
            position: absolute;
            bottom: 0;
            background-color: rgba(0, 0, 0, 0.4);
            min-height: 84px;
            .info-title {
                font-size: 14px;
            }
            .info-body {
                font-size: 13px;
            }
        }
    }
}
</style>
